Get as much time off work as you can manage, you will never ever get that chance again, the first only happens once. Its my biggest regret that I only had a week off for both ours.
My other recommendation is abuse those grandparents and try and abuse them equally.
Congratulations, however that is one present that will be costing you for the next 20 years or so ;-) (or longer, mine are 26 and 28 and still costing me)